Electrical condenser



March 1, 1927. 1,619,597

Y M. CLARK ELECTRICAL CONDENSER File Gb. l, 1926 wf] .--f'ig Patented Mar. l, 1927.

MICKLE CLARK, OF CH'ICAGO, -flLflfill'OS.

ELECTRICAL CONDENSER.

Application led February 1, 1926. Serial N o. 85,178.

My invention relates to improvements in electrical condensers especially adapted for use in radio receiving sets and has for its object the provision of a simple and etlicient construction of this character capable of delicate tuning adjustments and also capable of economical manufacture.

Other objects will appear hereinafter.

The invention consists in the combination and arrangements of parts hereinafter described and claimed.

- The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which,

Fig. 1 is a partial plan view of a condenser embodying the invention;

Fig. 2 a section taken on line 2-2 of Fig. 1; and F'Fig. 3 ,a section taken on line 3 3 of The preferred form of construction as illustrated in the drawings comprises two sheets 4 and`5 of suitable metal arranged parallel to and a short distance from each other, the sheet being provided with an inwardly offset edge portion G'secured to the sheet 4 by means of rivets 7. Both sheets are secured by screws 8 to a suitable support or post 9 as indicated. A suitable binding post 10 is mounted on the secured edges of said sheets to` facilitate electrical connection therewith.

A plurality of internal plates 1l made of suitable metal are interposed between the sheets 4 and 5 as shown. 'Ihe plates 11 are mounted between sets 0l tangs 12 struck up from the sheet 5 and provided with insulating blocks 13 whereby said plates 11 are permanently attached to but insulated from the sheet 5. Each plate ll is provided with a laterally extending arm or finger 14 upon which is mounted a suitable binding post 15 for effecting electrical connection therewith. Adjusting screws 16 are provided for each of the plates 11, said adjusting screwsbeing threaded in the plate 4 passing freely through anenlarged opening 17 in the corresponding plate 11 and resting against the plate 5 as shown and whereby the distance between the plates/11 and the sheet 4 may be slightly adjusted as desired. A

By this arrangement a simple and eiectivo condenser, or plurality of eondensers, is provided in which said condensers may be nicely adjusted or tuned into unison with each other or other condenser-s. The specific form and arrangement of parts constitutes a simple, eicctive and economical one for the purpose.

While I have illustrated and described the preferred form of construction for carrying my'invention into effect, this is capable of variation and modicatien without departing from the spirit of the invention. I, therefore, do not Wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the ap )ended claims.

aving described my'invention, what I c aim as new and desire to secure by Letters Patent is:

l. A condenser comprising two external plates; an internal plate interposed between said external plate, said internal plate being attached to, carried by but insulated from one of said external plates and free from said other external plate and means for adj listing said external plates laterally toward and away from each other thereby adjusting the distance between said internal platefnd said other external plate, substantially as described.

2. A condenser comprising two external platesattached to each other at one edge and arranged substantially parallel to each other a short distance apart; an internal plate permanently attached to but insulated from one ot said external plates; a binding post attached to said external plates; a sep@ arate binding post tor said internal plate; and means for adjusting the distance between said external plates, substantially as described.

3. A condenser comprising two external plates electrically connected together at one edge and arrangedl substantially parallel to each other a short distance apart; a plurality of internal plates permanently attached to but insulated from one of said external plates; a binding post attached to said external plates; a separate binding post for each of said internal plates; and means for adjusting the distance between said internal plates and said other external plate, substantially as described.

4. A condenser comprising two external plates electrically connected together at one edge and arranged substantially parallel to each other a short distance apart; a plurality of internal plates permanently attached of Said exiernzi pesi; attached to said exernai pieta-Sg a sepiiae binding post for each. of said internal plates; and an adjusing Screw passing' ieeij; through each o egizi internal plzies and connected wih said ex'emd pluies, subsantiaiiy :is described.

5. condemsei cenprising awo sheets of aeiaiiy parallel 330 each iam-1 ewait, one of the edges ugit and secured tom said secured edges;

Mates; :i hier,

:1 piuiniiy of sets of 'zmge struek upfrom one 0i said sheets i0 eonstitute plate moun'- ings; insuieting blocks on said tang'sg plaies mourned in said biocks between said sheets; an individual binding post on each of seid plates; and :m adjusting screw passing freely through each of seid plaes and COH- neeed with said sheets, subsanti Hy as described.

In fesimony whereof I name to this specification. i

MECVLE CLARK.

have signed lily 

